Upgrade blade and disc material n

Upgrade flow path aerodynamic design n s

Add or upgrade machinery performance,

diagnostic, and protective

instrumentation n l

Add instrumentation wire quick disconnect n l

Upgrade journal bearings to directed lube, offset pivot, or chrome copper n

Upgrade coupling from lubricated to dry-type n s

Upgrade thrust bearings to directed lube, offset pivot, or chrome copper n s

Upgrade to single piece forged inlet casing n

Upgrade strut design n

Upgrade to boltless integral stator design n

SERVICE

Power Recovery Expander Modifications and ReratesElliott power recovery expanders produce power from the valuable thermal energy in the waste gas stream of the fluid catalytic cracking (FCC) process. A hot gas expander typically drives either the main FCC air compressor train or an electric generator, reducing a refinery’s power consumption and carbon footprint. Elliott introduced the first commercial hot gas expander in 1963, and in the decades since this engineering breakthrough, has continued to enhance its expander design. Today, Elliott’s fourth-generation expanders recover up to 60,000 horsepower (45MW) from FCC flue gas streams and regularly exceed required run times between planned outages.

Upgrading a power recovery expander has multiple, immediate benefits. Working closely with the customer, Elliott conducts site audits to evaluate expander performance and identify upgrades that will keep performance high and maintenance costs low. An upgrade by Elliott Engineered Solutions of an Elliott expander or a machine from another manufacturer, will enhance performance, lower operating costs, increase reliability, reduce unplanned outages, and extend the time between planned shutdowns. Elliott expander upgrades also contribute to refinery environmental compliance initiatives, while maintaining or improving overall plant safety and efficiency.

Add corrosion-resistant blade root and disk coating n

Add advanced erosion resistant blade coating n

n Reliability s Efficiency l Safety Controls

Other Modifications:Perform site audit n s l

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901 North Fourth StreetJeannette, PA 15644-1473Phone: 724-527-2811Fax: 724-600-8442Email: info@elliott-turbo.com

www.elliott-turbo.com

Enhancement Category Benefit

Add advanced erosion resistant blade coating Reliability Reduce the effect of catalyst wear on airfoils

Add corrosion-resistant blade root and disk coating Reliability Prevent sulfidation corrosion in partial combustion atmospheres

Add instrumentation wire quick disconnect Reliability. Safety Reduce chance of oil leak; reduce maintenance time

Add or upgrade machinery performance, diagnostic, and protec-tive instrumentation Reliability. Safety Improve machinery performance, health monitoring and protective instru-

mentation

Perform site audit Reliability. Safety. Efficiency Identify areas to upgrade for peak performance

Upgrade blade and disc material Reliability Improve high temperature corrosion resistance in partial combustion atmospheres

Upgrade coupling from lubricated to dry-type Reliability. Efficiency Eliminate oil requirements; improve rotor dynamics

Upgrade flow path aerodynamic design Reliability. Efficiency Minimizes catalyst erosion on the rotating blades and increase efficiency

Upgrade journal bearings to directed lube, offset pivot, or chrome copper pads Reliability Improve rotor stability at operating speed

Upgrade strut design Reliability Reduce the potential for nose cone strut cracking

Upgrade thrust bearings to directed lube, offset pivot, or chrome copper pads Reliability. Efficiency Reduce oil requirements, bearing temperature, and bearing heat loss

Upgrade to boltless integral stator design Reliability Eliminate the high-temperature hardware required to mount the integral stator assembly

Upgrade to single piece forged inlet casing Reliability Eliminate the potential for weld cracking/flue gas leaks

The harsh FCC operating environment requires expert knowledge of materials and extreme accuracy when replacing or upgrading expander components. Elliott’s Materials Engineering Laboratory leads the industry in research in expander ap-plications. Elliott engineers use FARO CMM technology together with calibrated hand-measurement tools, to determine the precise dimensions of expander components, regardless of the original manufacturer. Elliott accurately replicates components and provides mechanical and metallurgical enhancements to improve the reliability of any hot gas expander. Elliott parts are manufactured to ISO 9001:2008 standards using computer-controlled multi-axis machine tools.

Elliott Engineered SolutionsElliott Engineered Solutions has one focus – to help customers obtain the highest value from their critical rotating equip-ment. Elliott has more than 100 years of experience in engineering, manufacturing repairing, and modifying all types of turbomachinery. Elliott Engineered Solutions specializes in the following areas:

� Modifications and rerates of turbomachinery to increase the operational life and value of your investment by optimizing performance and reducing downtime.

� Reverse engineering and comprehensive analytical studies such as lateral and torsional rotor analysis, root-cause failure analysis, mechanical evaluation analysis, finite element analysis (FEA), and aerodynamic analysis.

� Onsite audits to evaluate turbomachinery efficiency and determine potential reliability improvement s to maximize your return on existing equipment.